导读：词组能有效的帮助大家提高完型和句子的理解与写作质量，为保证大家能够灵活运用考研重点词组，社科赛斯李梅老师特配以相应的例句，帮助大家更快地获得更高的分数。
521.let alone更不用说；不打扰
Let him alone. He needs a rest.
别去打搅他，他需要休息一下。
She can’t ride a bicycle, let alone drive a car.
她连自行车都不会骑，更别说开小汽车了。
522.let down 放下，降低；使失望
Sadly, the film is let down by an excessively simple plot.
遗憾的是，过于简单的情节使得这部电影差强人意。
523.let go (of) 放，松手
In therapy, she began to let go of her obsession with Mike.
在心理治疗中，她开始逐渐放下对麦克的痴迷。
524.let off 宽恕，放过；开(枪)，放(炮、烟火等)
to let off a few fireworks放几个烟火
He let off steam by yelling at a clerk.
他对一个职员大喊大叫，借以发泄怒气。
525.let out 放走，释放；泄露，放出，发出
She heard him let out a pitiful groan.
她听到他发出一声令人悲悯的呻吟声。
When she saw him, she let out a cry of horror.
她看见他时吓得大叫一声。
526.be liable for 对...有责任
You will be liable for any damage caused.
你必须对造成的任何损失负赔偿责任。
527.liable to 易患...的，易受…，有…倾向的
The car is liable to overheat on long trips.
这辆车跑长途容易过热。
528.lie in (问题、事情等)在于
All their hopes lie in him.
他们把所有的希望都寄托在他身上。
529.little by little 逐渐地
I would have to learn, little by little, to exist alone.
我的慢慢学会独自生活。
530.live on （动物）以...为食；（人）靠...生活
They are still having to live on every low income.
他们现在还得靠微薄的收入过日子。
